Evaluation Tests of a Low-Sinter-Temperature, Ceramic Metalizing Process

摘要

A series of evaluation tests were made of a low-sinter-temperature, refractory-metal-oxides (MoO3/MnO2) ceramic metalizing suspension. The tests were made to determine what limitations, if any, exist for the application of the low-sinter-temperature (900C to 1100C) metalizing suspension for electron-tube fabrication. The metalizing suspension was found to be easy to handle, especially since ordinary brazing furnaces rather than special high-temperature sinter furnaces can be used for the sintering process. In addition, no overplating of the sintered-metalized ceramic surfaces was needed to produce high-strength, hermetic seals. The highest tensile strength, most reliable ceramic-to-ceramic and ceramic-to-metal seals were obtained when the maximum sinter temperature of 1100C was used in conjunction with the vacuum-tube grade solders OFHC copper, nickel-gold eutectic, and gold-copper eutectic. (Author)